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Slow-mo frame rate math help!
Hey all looking for help with anyone better at math than me (clearly I’m horrible.) I have some footage that’s 23.98fps – but it’s playing slow motion. So clearly it was originally shot at 60- 120fps and exported as 23.98. So now I’m editing trying to get it to play realtime and I’m too horrible at math for this. Anyone know how to figure out how much I should speed it up if it was shot at 60fps and the math for 120fps as well please! I know that if I was slowing it down it would be 60fps = 40% 120fps = 20%, but I don’t know why I cannot seem to do this math the other way 😢. Would speeding up the 60fps = 160% and 120fps = 180% ?? Ha I have no idea. Thank you!!!
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3 Replies
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Hey Kelly,
Looks like you found the answer.
Solved by FCP Legacy, many years ago:
https://creativecow.net/forums/thread/make-slow-mo-with-footage-look-like-regular-speed/Please do share if this work-around worked?
Adding that when fiddling with frame-rates and progressive video, watch out for flicker in the black levels of your video.
Should not be a problem if converted from 12fps, but if that originally were converted incorrectly, you may experience flicker in the black areas of the image – all depends on a large number of factors. So it might not be there.Well done to you for finding the solution!
Atb
Mads
creativecow.net
make slow mo with footage look like regular speed - Apple Final Cut Pro Legacy - Creative COW
make slow mo with footage look like regular speed - Apple Final Cut Pro Legacy - Creative COW
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Thanks so much! Yes the answer was in the comments of what you shared from that FCP legacy post. It’s this:
Math. 59.94/23.98=2.49958 (250%)
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Wouldn’t another solution (if you know the capture rate) be to Modify>Interpret footage…
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